16144026421 has 8 divisors (see below), whose sum is σ = 17115136920. Its totient is φ = 15175300608.

The previous prime is 16144026407. The next prime is 16144026427. The reversal of 16144026421 is 12462044161.

It can be written as a sum of positive squares in 4 ways, for example, as 465480625 + 15678545796 = 21575^2 + 125214^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16144026421 - 2¹⁷ = 16143895349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16144026427) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582216 + ... + 609313.

It is an arithmetic number, because the mean of its divisors is an integer number (2139392115).

Almost surely, 2^16144026421 is an apocalyptic number.

It is an amenable number.

16144026421 is a deficient number, since it is larger than the sum of its proper divisors (971110499).

16144026421 is a wasteful number, since it uses less digits than its factorization.

16144026421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192343.

The product of its (nonzero) digits is 9216, while the sum is 31.

The spelling of 16144026421 in words is "sixteen billion, one hundred forty-four million, twenty-six thousand, four hundred twenty-one".